Water-tube boiler with superheater



B. BROIDO. WATER TUBE BOILER WITH SUPERHEATEH- APPLICATION FILED JUNE4| I919- 1,417,024, I Patented May23, 1922.

2 SHEETS-SHEET I.

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WATER TUBE BOILER WITH SUPERHEATER. APPL ICATION FILED JUNE 4,'1919.

1,417,024. mm May23,1922" -2 SHEETS-{SHEET 2.

a so o'eo 00 6o N 3am UNITED STATES PATENT omen.

f; BZENJ'AMIII.\T BROIDO, OF NEW YORK, N. Y., ASSIGNOR TO THE SUPERHEATEB COM- PANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

WATER-TUBE BOILER, WITH SUPERHEATEB.

Application filed June 4,

To all whom it may com-em:

Be itknown that I, BENJAMIN Bnomo, citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Im )roveinents in Water- Tube Boilers With Cuperhcaters, of which the following is a specification.

My inventionrelates to water tube boilers of the type having two downwardly diverging banks of water tubes and has forits purpose the-provision of means whereby the superheater may be placed in the upper part of the combustion chamber formed by the two banks of tubes and yet may be protected against anexcessive amount of heat from the furnace located directly below this combustion space.

In the accompanying drawings, my invention is illustrated in two forms; Fig. 1 show: ing a cross section of boiler with my invention in place; Fig. 2 being a longitudinal central section of Fig. l and Fig. 3 illustrating a modification.

The boiler to which my invention is shown applied in the drawings will be seen to-be composed of a left and a right half which are generally speaking symmetrical with each other; each comprises an upper drum 1 and 1" respectively and a lower drum 2 and 2" respectively joined to each other by water tubes. These water tubes diverge downwardly so that the lower drums are spaced apart farther than .the upper. The

water tubes of each half are grouped into three sets numbered 3, 4, 5, 3", 4" and 5" respectively. Between the two groups of tubes 3 and 3f, there'is thus defined a combustion space 'widenjh tllthe bottom than at the top. Below this combustion space is l'o- I", .cated the furnace chamber 6. Gaseous prod .-ucts from this furnace. have theircomb'ustion completed in the combustion chamber and are then guided over the banks of tubes b? means of baflics 7", 3 and 7", 8" respeciely a, theronncctioiis leading the rili kfk housings I "f hisstructure Specification of Letters Patent. Patented luay 23, 1 922,

1919. Serial No. 301,819.

chamber pass upward along the tubes of the banks 3 and 3", then downward through the banks 4 and. 4" again upward over banks 5, 5" and so out through the connections 9 and 9". In passing over the tubes as described, they heatthe water, generating, steam, which is collected in the drums 1 and l and. is taken off from them through the steam pipes 10' and 10. Various places have been proposed forlooating superheaters in boilers of this general them the upper portion'of the combustion space. This latter location has certain advantages but provisions will have to be made to protect the superheater so located against excessively hot gases coming di-' rectly from the furnace. The novel means which I propose herein ,forthis purpose will bepfound to accomplish the purpose of protecting the superheater and toolfer few, if any, objectionable features. A' drum 11 is type, among placed in a position parallel to the drums y l, 1", 2' and2f and at a central point in'the combustion space somedista-nce'fromits top. To this drum are 'c-onnectedfthe tubes 12? and 12* whose other ends are joined to the drums 2 and 2 respectively. These tubes curved away from these banks toward the drum 11' which they enter radially. In this manner'there is set oil .a space 14 in which Ilocate my superheaten l The particular constructiorrofithe superheaterdoes not strictly part of m invention, but'thejform shown and descri a .very desirable one. Two sets ofr'superheater elements or units'are employed, all

oflthc units being of the. same shape} The units are-made u of'pip'df suitable diameter and gauge,

e joi fld to-theheaders'fi'. and

- in ie-a meedw peration itheboil'erih uses after leavmgthe furnace fi-pass, throng bespeaking, form a din what follows is found lto, be

nt into at shape utilizing thespace 1 wythe' best advantage-Q Their upper ends I Y I p tween tlie tubes of the sets 12" and 12', part of them going directly over the banks 3" and 3" and the remaining portion passing through the sets 13 and 13" over the super- 5 heater in space l lllpack again through the sets 13* and 13 rejoining the portion 01 the gases and going with them into the second pass. The passage through the sets of tubes 12, 12", 13 and 13" does not cool the gases below the point where they will still have enough heat left to raise the temperature of the steam circulating through the superheater units toa high point. But the direct radiation from the furnace is effectually cut oil 15- from the superheater so its units are not injured even at times when no steam is circuulating through them.

The pipes in the sets l2*., 12", v 3 and 13 as well as the drum 11 are in no danger of being in'ured by the heat as they are at.all --times fil ed with water and function very much like the boiler tubes proper.. Any

steam that is generated in them is delivered at theirnpperends into the drums 1 and 1".

Any given unit or element of the super-- heaterscan readily be removed. :All that is necessary is to detach its upper ends from the headers after which it can be withdrawn upward through the space between the headers on the left and on the right. During this removal, it will be slid-into a space be- .tween two unitsor elements in the set/at- ,y tached to the opposite header. i 1' The means by which the housing is closed Blifatthe point 17 is suchthat it can be removed in convenient sections so that, if it is desired to iemove only one or a few units, only enough of this cover has to be removed to make this possible, the remainder remaining intact.

, In the variation shown in Fig. 3, the drum 11 is omitted and the tubes 18 and 18 run I directly from the lower. drums to the oppo- 'site upward 2 drums. There are shown in this figure two sets, one above the other, of tubes 18 and 18", but it. will be understood that at times it will be suliicent to use only one such set from each lower drum to the opposite upward drums At the point- 19, these sets of tubes cross in such manner that the tubes of one set occupy the spaces between those of the other. The other details of; this spaced apart farther-than the-upper a form do not vary inanymanner frointhat previously described and the function of the apparatus will be evident. It may be pointed out at this place, that in the form of the apparatus of Figs. 1 and'Q, there might also be two set of tubes on each side, one above the other. 1

In practice, there will no doubt occur many variations in my invention without an departure from its spirit.

What I claim is: i

1. In a boiler the combination oftwo upper and two lower spaced parallel drums, two diverging banks of tubes connecting the two upper to the two lower drums, two additional rows of spaced tubes each communieating with an upperdrum and adjacent and parallel to one of the diverging banks for a certain distancefrom the top and then bent toward and communicatingrwith the opposite lower drum so'that the tubes'oi one cross those of the other 'and therebyscreen the upper portion of the space between the 7.5 diverging banks from the lower, supei-heate headers above the upper portion o space, and tubular superheater elementszs' cured to the headers and looping intojsaid' upper portion of the space. 0 2. In a boiler; the combinationoftan iup per and a 'lower left and an upper and a. lower right drum, the lower drums belinfg bank of water tubes connecting th of drums, a right bankofwatei -tubesxcon- 1 necting the right pair, a. furnace in the lower portion of the space defined by the'drums and connecting banks of tubes a su'perlieater in the upper portion of said space; and means to protect the super-heater against direct contact with-gases from "the 'furnace comprising a plurality of spaced tubeseach comprising a portion placed between the Su- 1 perheater and the furnace and aportion adjacent to and substantially parallel to. one" of the banks of tubes, and each 'communi cating with an upper drum and the lower fdrum on the opposite'side'.

dat New,Y oi-k"i1i the-county of 1 00 New York and State of New 'Yorlithis 31st day of Ma A. D, 1919 i 

